A car moving at 16.0 m/s, passes an observer while its horn is pressed. Find the difference between the frequencies of sound heard when the car approaches and when it recedes from the stationary observer. The velocity of sound is 343 m/s and the frequency of the sound of the car's horn is 583 Hz.
A. 42.2 Hz
B. 54.5 Hz
C. 61.8 Hz
D. 65.4 Hz

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